Apple watch series 10 not charging

Hi I recently purchased the series 10 watch and everything good until the last few days where it refuses to charge. I have tried the old cable that I had with the series 6 (which still works - I have tested it), tried the new cable that came with the watch, tried soft and hard re boot. When i do this it works for about 1 minute then stops charging again. Is there anything I have missed or is it a faulty watch?